The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 08, 2005
Filed:
Nov. 15, 2001
Michael Asam, Wollomoos, DE;
Stefan Herzinger, München, DE;
Gunther Kraut, Unterhaching, DE;
Martin Simon, Otterfing, DE;
Xiaopin Zhang, München, DE;
Michael Asam, Wollomoos, DE;
Stefan Herzinger, München, DE;
Gunther Kraut, Unterhaching, DE;
Martin Simon, Otterfing, DE;
Xiaopin Zhang, München, DE;
Infineon Technologies AG, Munich, DE;
Abstract
A polar loop transmission circuit is proposed wherein a signal to be transmitted and a feedback signal are separated into their polar phase and amplitude components and the components are compared to one another for realizing a phase and amplitude modulation. An amplitude modulator controlled by an amplitude modulation signal is provided, whereby the amplitude modulator follows an oscillator and is preferably fashioned as a nonlinear amplifier that is operated in saturation. An amplifier attenuating the output signal of the amplitude modulator is provided in the feedback path. The present transmission architecture is suitable for future mobile radio telephone systems having a phase and amplitude modulation and are based on the known GSM standard, for example.